class SidebarNavigation {
constructor(options = {}) {
// Basic configuration properties
this.config = {
minWidth: options.minWidth || MegaMenuCONFIG.minWidth, // Using external minWidth variable
menuSelector: options.menuSelector || '.dwc-nest-menu',
openClass: options.openClass || 'brx-open',
activeClasses: options.activeClasses || ['open', 'active'],
leftHeaderClass: options.leftHeaderClass || 'brx-header-left',
rightHeaderClass: options.rightHeaderClass || 'brx-header-right',
debounceDelay: options.debounceDelay || 100,
menuItemClickDelay: options.menuItemClickDelay || 300
};
// Set dependent selectors
const menuSelector = this.config.menuSelector;
this.config.submenuToggleSelector = options.submenuToggleSelector || `${menuSelector} .brx-submenu-toggle`;
this.config.dropdownSelector = options.dropdownSelector || `${menuSelector} .brxe-dropdown`;
this.config.dropdownContentSelector = options.dropdownContentSelector || `${menuSelector} .brx-dropdown-content`;
// State
this.previousHeaderClass = null;
this.dropdownClickHandlers = new Map();
this.menuHoverHandlers = null;
this.menuItemClickTimeout = null;
this.keyboardNavHandler = null;
this.cachedFocusableElements = null;
this.cachedElements = {
menuElement: null,
navElement: null,
dropdowns: null,
dropdownToggles: null,
menuItems: null
};
// Bind methods to this instance
this.handleResize = this.debounce(this.handleMenu.bind(this), this.config.debounceDelay);
this.handleOutsideClick = this.handleOutsideClick.bind(this);
}
// Initialize everything - called once
init() {
// Wait for DOM to be fully loaded before attaching events
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', () => {
this.initAfterDOMLoaded();
}, { once: true });
} else {
this.initAfterDOMLoaded();
}
return this;
}
// Separate initialization method to run after DOM is loaded
initAfterDOMLoaded() {
// Cache DOM elements once
this.cacheElements();
// Setup resize event with passive flag
window.addEventListener('resize', this.handleResize, { passive: true });
// Setup mutation observer for critical class changes only
this.setupMutationObserver();
// Initial setup based on current screen size
this.handleMenu();
// Cache focusable elements once if header class is present
if (this.hasHeaderClass()) {
this.cacheFocusableElements();
this.setupMenuFocusNavigation();
}
}
// Cache all required DOM elements upfront
cacheElements() {
this.cachedElements.menuElement = document.querySelector(this.config.menuSelector);
if (this.cachedElements.menuElement) {
this.cachedElements.navElement = this.cachedElements.menuElement.querySelector('.dwc-nest-nav-items');
this.cachedElements.dropdowns = Array.from(document.querySelectorAll(this.config.dropdownSelector));
this.cachedElements.dropdownToggles = Array.from(document.querySelectorAll(this.config.submenuToggleSelector));
this.cachedElements.menuItems = Array.from(document.querySelectorAll(`${this.config.menuSelector} .menu-item`));
}
}
// Set up a focused mutation observer only for dropdown state changes
setupMutationObserver() {
if (!this.cachedElements.dropdowns || this.cachedElements.dropdowns.length === 0) return;
const callback = (mutations) => {
for (let mutation of mutations) {
if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
const target = mutation.target;
const prevClassList = mutation.oldValue ? mutation.oldValue.split(' ') : [];
const hadBothBefore = prevClassList.includes('open') && prevClassList.includes('active');
const hasBothNow = target.classList.contains('open') && target.classList.contains('active');
if (hadBothBefore !== hasBothNow) {
this.updateDropdownAccessibility();
break; // Only need to update once per batch
}
}
}
};
// Create observer with optimized options
this.classObserver = new MutationObserver(callback);
// Observe only the dropdown elements
this.cachedElements.dropdowns.forEach(dropdown => {
this.classObserver.observe(dropdown, {
attributes: true,
attributeFilter: ['class'],
attributeOldValue: true
});
});
}
// Cache focusable elements for keyboard navigation
cacheFocusableElements() {
if (!this.cachedElements.navElement) return;
// Get direct children of nav
const directChildren = Array.from(this.cachedElements.navElement.children);
// Find the first focusable element within each direct child
this.cachedFocusableElements = directChildren.map(child => {
// Check if the child itself is focusable
if (child.matches('a, button, input, select, textarea, [tabindex]:not([tabindex="-1"])')) {
return child;
}
// Otherwise, find the first focusable element within this child
return child.querySelector('a, button, input, select, textarea, [tabindex]:not([tabindex="-1"])');
}).filter(Boolean); // Remove null/undefined values
}
// Clean up all event listeners and observers
destroy() {
// Clean up the mutation observer
if (this.classObserver) {
this.classObserver.disconnect();
this.classObserver = null;
}
// Clean up resize listener
window.removeEventListener('resize', this.handleResize);
// Clean up click handlers
if (this.dropdownClickHandlers.size > 0) {
this.dropdownClickHandlers.forEach((handler, toggle) => {
toggle.removeEventListener('click', handler);
});
this.dropdownClickHandlers.clear();
}
// Clean up hover handlers
this.cleanupMenuHover();
// Clean up menu item click handlers
this.cleanupMenuItemClicks();
// Clean up outside click handler
document.removeEventListener('click', this.handleOutsideClick);
// Clean up keyboard navigation
if (this.keyboardNavHandler) {
document.removeEventListener('keydown', this.keyboardNavHandler);
this.keyboardNavHandler = null;
}
// Clear any pending timeouts
if (this.menuItemClickTimeout) {
clearTimeout(this.menuItemClickTimeout);
this.menuItemClickTimeout = null;
}
}
// Utility methods
hasHeaderClass() {
return document.body.classList.contains(this.config.leftHeaderClass) ||
document.body.classList.contains(this.config.rightHeaderClass);
}
debounce(func, delay) {
let timer;
return (...args) => {
clearTimeout(timer);
timer = setTimeout(() => func(...args), delay);
};
}
// Check if an element has all the required active classes
hasAllActiveClasses(element) {
return this.config.activeClasses.every(className => element.classList.contains(className));
}
// Toggle all active classes on an element
toggleActiveClasses(element) {
this.config.activeClasses.forEach(className => {
element.classList.toggle(className);
});
}
// Core functionality methods
handleMenu() {
if (!this.cachedElements.menuElement) return;
if (!this.hasHeaderClass() && !this.previousHeaderClass) return;
const screenWidth = window.innerWidth;
const isLargeScreen = screenWidth >= this.config.minWidth;
const menuElement = this.cachedElements.menuElement;
if (!isLargeScreen) {
// Save which class was present before removal
if (this.hasHeaderClass()) {
this.previousHeaderClass = document.body.classList.contains(this.config.leftHeaderClass)
? this.config.leftHeaderClass
: this.config.rightHeaderClass;
// Remove header classes
document.body.classList.remove(this.config.leftHeaderClass, this.config.rightHeaderClass);
menuElement.classList.remove(this.config.openClass);
// Reset accessibility attributes
this.resetAccessibilityAttributes();
}
// Clean up event handlers for mobile view
this.cleanupMenuHover();
this.cleanupMenuItemClicks();
this.cleanupDropdownHandlers();
document.removeEventListener('click', this.handleOutsideClick);
return;
}
// Large screen behavior
if (!this.hasHeaderClass() && this.previousHeaderClass) {
document.body.classList.add(this.previousHeaderClass);
}
if (this.hasHeaderClass()) {
if (!menuElement.classList.contains(this.config.openClass)) {
menuElement.classList.add(this.config.openClass);
}
// Setup elements for large screen view
this.setupMenuHover();
this.setupMenuItemClicks();
this.setupDropdownHandlers();
this.setupMenuFocusNavigation();
this.updateDropdownAccessibility();
// Ensure outside click handler is set up
document.removeEventListener('click', this.handleOutsideClick);
document.addEventListener('click', this.handleOutsideClick, { passive: false });
}
}
// Reset accessibility attributes when switching to mobile
resetAccessibilityAttributes() {
if (!this.cachedElements.dropdowns) return;
// Remove all inert attributes from dropdown contents
this.cachedElements.dropdowns.forEach(dropdown => {
const content = dropdown.querySelector(this.config.dropdownContentSelector);
if (content) {
content.removeAttribute('inert');
}
const button = dropdown.querySelector('button');
if (button) {
button.setAttribute('aria-expanded', 'false');
}
});
}
setupMenuFocusNavigation() {
// Only run if hasHeaderClass() is true and we have focusable elements
if (!this.hasHeaderClass() || !this.cachedFocusableElements || this.cachedFocusableElements.length === 0) {
return;
}
// Clean up previous handler if it exists
if (this.keyboardNavHandler) {
document.removeEventListener('keydown', this.keyboardNavHandler, true);
this.keyboardNavHandler = null;
}
const navMenu = this.cachedElements.menuElement;
const focusableElements = this.cachedFocusableElements;
const firstFocusableElement = focusableElements[0];
const lastFocusableElement = focusableElements[focusableElements.length - 1];
// Find adjacent focusable elements outside the menu (only once during setup)
const headerElement = navMenu.closest('header') || document.querySelector('header');
// Prepare variables to hold adjacent elements
let prevFocusableElement = null;
let nextFocusableElement = null;
let firstElementAfterHeader = null;
if (headerElement) {
// Get all focusable elements within the header - do this once and cache the result
const headerFocusables = Array.from(
headerElement.querySelectorAll('a:not([tabindex="-1"]), button:not([tabindex="-1"]), input:not([tabindex="-1"]), select:not([tabindex="-1"]), textarea:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"])')
).filter(el => window.getComputedStyle(el).display !== 'none');
// Find the index of our first and last menu elements in one pass
const menuStartIndex = headerFocusables.indexOf(firstFocusableElement);
const menuEndIndex = headerFocusables.indexOf(lastFocusableElement);
// Cache the adjacent elements
if (menuStartIndex > 0) {
prevFocusableElement = headerFocusables[menuStartIndex - 1];
}
if (menuEndIndex !== -1 && menuEndIndex < headerFocusables.length - 1) {
nextFocusableElement = headerFocusables[menuEndIndex + 1];
}
// Pre-calculate the first element after header - but only if needed
if (!nextFocusableElement) {
// Use a more efficient selector that targets immediate children of body that aren't the header
const selector = 'body > *:not(header)';
const nonHeaderElements = document.querySelectorAll(selector);
// Only process if we have elements
if (nonHeaderElements.length > 0) {
// Create a function to find the first focusable element (used later if needed)
this.findFirstFocusableAfterHeader = () => {
for (const element of nonHeaderElements) {
const focusable = element.querySelector('a:not([tabindex="-1"]), button:not([tabindex="-1"]), input:not([tabindex="-1"]), select:not([tabindex="-1"]), textarea:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"])');
if (focusable && window.getComputedStyle(focusable).display !== 'none') {
return focusable;
}
}
return null;
};
}
}
}
// Create keyboard navigation handler with closure over the cached elements
this.keyboardNavHandler = (e) => {
// Quick check for Tab key first
if (e.key !== 'Tab') return;
// Then check if focus is inside the menu
if (!navMenu.contains(document.activeElement)) return;
let targetElement = null;
// Handle tab navigation at boundaries only
if (!e.shiftKey && document.activeElement === lastFocusableElement) {
// Forward tab from last element
e.preventDefault();
e.stopPropagation();
if (nextFocusableElement) {
targetElement = nextFocusableElement;
} else if (this.findFirstFocusableAfterHeader) {
// Only search for elements after header if needed and not already found
firstElementAfterHeader = this.findFirstFocusableAfterHeader();
targetElement = firstElementAfterHeader;
}
// Focus on the target or body as fallback
setTimeout(() => {
if (targetElement) {
targetElement.focus();
} else {
document.body.setAttribute('tabindex', '-1');
document.body.focus();
document.body.removeAttribute('tabindex');
}
}, 10);
}
else if (e.shiftKey && document.activeElement === firstFocusableElement) {
// Backward tab from first element
e.preventDefault();
e.stopPropagation();
setTimeout(() => {
if (prevFocusableElement) {
prevFocusableElement.focus();
} else {
document.body.setAttribute('tabindex', '-1');
document.body.focus();
document.body.removeAttribute('tabindex');
}
}, 10);
}
};
// Use capture phase for the event
document.addEventListener('keydown', this.keyboardNavHandler, true);
}
setupMenuHover() {
const menuElement = this.cachedElements.menuElement;
if (!menuElement) return;
// Clean up existing hover handlers first
this.cleanupMenuHover();
// Create event handlers
const mouseenterHandler = () => {
menuElement.classList.add(this.config.openClass);
};
const mouseleaveHandler = () => {
menuElement.classList.remove(this.config.openClass);
};
// Add event listeners with passive flag for better performance
menuElement.addEventListener('mouseenter', mouseenterHandler, { passive: true });
menuElement.addEventListener('mouseleave', mouseleaveHandler, { passive: true });
// Store the handlers for cleanup
this.menuHoverHandlers = {
element: menuElement,
mouseenter: mouseenterHandler,
mouseleave: mouseleaveHandler
};
}
cleanupMenuHover() {
if (this.menuHoverHandlers) {
const { element, mouseenter, mouseleave } = this.menuHoverHandlers;
element.removeEventListener('mouseenter', mouseenter);
element.removeEventListener('mouseleave', mouseleave);
this.menuHoverHandlers = null;
}
}
setupMenuItemClicks() {
if (!this.cachedElements.menuItems || this.cachedElements.menuItems.length === 0) return;
// Clean up existing handlers first
this.cleanupMenuItemClicks();
const menuElement = this.cachedElements.menuElement;
const menuItemHandlers = new Map();
this.cachedElements.menuItems.forEach(item => {
const clickHandler = () => {
if (this.hasHeaderClass()) {
// Clear any existing timeout
if (this.menuItemClickTimeout) {
clearTimeout(this.menuItemClickTimeout);
}
// Set timeout before adding the class
this.menuItemClickTimeout = setTimeout(() => {
if (!menuElement.classList.contains(this.config.openClass)) {
menuElement.classList.add(this.config.openClass);
}
}, this.config.menuItemClickDelay);
}
};
menuItemHandlers.set(item, clickHandler);
item.addEventListener('click', clickHandler);
});
this.menuItemClickHandlers = menuItemHandlers;
}
cleanupMenuItemClicks() {
if (this.menuItemClickHandlers && this.menuItemClickHandlers instanceof Map) {
this.menuItemClickHandlers.forEach((handler, item) => {
item.removeEventListener('click', handler);
});
this.menuItemClickHandlers.clear();
}
if (this.menuItemClickTimeout) {
clearTimeout(this.menuItemClickTimeout);
this.menuItemClickTimeout = null;
}
}
setupDropdownHandlers() {
if (!this.hasHeaderClass() || !this.cachedElements.dropdownToggles) return;
// Clean up existing handlers first
this.cleanupDropdownHandlers();
this.cachedElements.dropdownToggles.forEach(toggle => {
const clickHandler = (event) => {
event.stopPropagation();
event.preventDefault();
const dropdown = toggle.closest(this.config.dropdownSelector);
if (dropdown) {
this.toggleActiveClasses(dropdown);
this.updateDropdownAccessibility();
}
};
this.dropdownClickHandlers.set(toggle, clickHandler);
toggle.addEventListener('click', clickHandler);
});
}
cleanupDropdownHandlers() {
if (this.dropdownClickHandlers.size > 0) {
this.dropdownClickHandlers.forEach((handler, toggle) => {
toggle.removeEventListener('click', handler);
});
this.dropdownClickHandlers.clear();
}
}
handleOutsideClick(event) {
if (event.target.tagName === 'A') return;
if (!event.target.closest(this.config.dropdownSelector)) return;
if (!event.target.closest(this.config.submenuToggleSelector)) {
event.preventDefault();
event.stopPropagation();
}
}
updateDropdownAccessibility() {
// Only run if hasHeaderClass() is true
if (!this.hasHeaderClass() || !this.cachedElements.dropdowns) return;
this.cachedElements.dropdowns.forEach(dropdown => {
const content = dropdown.querySelector(this.config.dropdownContentSelector);
const button = dropdown.querySelector('button');
// Check if dropdown has all active classes
const isOpen = this.hasAllActiveClasses(dropdown);
if (content) {
if (isOpen) {
content.removeAttribute('inert');
} else {
content.setAttribute('inert', '');
}
}
if (button) {
button.setAttribute('aria-expanded', isOpen ? 'true' : 'false');
}
});
}
}
const sidebarNav = new SidebarNavigation().init();
Metro Vancouver Asphalt Services
Professional Asphalt Services in Metro Vancouver
Asphalt Services for Homeowners, Strata & Businesses across all of Metro Vancouver
This video showcases VALROC’s asphalt paving projects across Metro Vancouver, including driveways, strata roadways, and commercial parking lots. Watch our in-house crews and equipment deliver structured, durable asphalt installations built for long-term performance.
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All Asphalt Services
At VALROC, our construction services are designed to integrate seamlessly, giving you the flexibility to explore complementary solutions today or scale your project tomorrow.
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Who We Build For
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Efficient paving and excavation services by VALROC Metro Vancouver transforming residential construction sites.
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Located in Langley, VALROC regularly works with strata communities throughout Metro Vancouver, providing everything from asphalt patch repairs and parking lot restoration to speed bumps, pathways, utility pads, and larger asphalt replacement projects. Every job is carefully planned to maintain safe pedestrian access, minimize disruption to residents, and deliver durable, long-lasting results.
- Expert concrete repair services in Metro Vancouver by VALROC.
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Client Experiences
Real Clients. Real Projects. Real Results.
Every successful project is measured by more than the finished construction. From homeowners and strata councils to commercial property managers, our clients trust VALROC to deliver quality workmanship, clear communication, and dependable service. Here are a few of the experiences they’ve shared after working with our team.
I didn’t realize how complex it was going to be, and in the end, it really surprised me how well it was actually done and how well it actually works.
The staff at the office are very very good with us, the staff on-site are marvellous to deal with, they are very responsive to request. We've done a number of projects with VALROC
VALROC was offered additional scope including preload, site services, rerouting storm mains, fibre optics, 25 kVA power supply to the facility, and including installing all foundation / footings for a large industrial building extension
Every successful construction project starts with the right plan. Tell us about your project, and we’ll arrange a professional on-site consultation to discuss your options, answer your questions, and provide a detailed estimate based on your property’s unique requirements.
Heavy construction equipment at a site in Metro Vancouver for infrastructure development.
